Added new radio buttons for single or multi-file handling;
Added necessary methods and variables for multiple file handling;
Various tweaks to the UI regarding multi-file handling;
Fixed misplaced call to processMultiFiles();
Added updated BitmapEncoder.jar;
Updated .gitattrbutes
Minor code tweaks;
Added visibility modifiers to some variables and methods;
Created getters/setters where necessary;
Added variables to hold various settings values;
Added methods for writing settings to and retrieving settings from disk;
Settings are now saved to and read from a file on disk;
'Allow Directory Selection' option is now saved to disk;
Updated BitmapEncoder.jar
Renamed new variables to something sensible;
Removed unused variable in BitmapEncoder;
Fixed issue with some variables not being set during mode change;
Updated BitmapEncoder.jar
Output is now updated in multi file mode when threshold slider is moved;
Moved setting of directories for file chooser to constructor for consistency;
Merge pull request #1 from HellUnit/multi_file_handling

Multi file handling